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I Supported Toymods
Location:
south Melbourne/KL
Registered:
June 2004
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Location:
c'town, NSW
Registered:
May 2002
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Re: 7age vs 7afe??
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Mon, 15 November 2004 21:27
 
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| b1gb3n wrote on Tue, 16 November 2004 05:52 |
There was also talk that F heads have better flow than G heads.
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from what i recall it should be, a certain (cant remember the model) F head has the potential to flow better than the G head.
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I Supported Toymods
Location:
south Melbourne/KL
Registered:
June 2004
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Re: 7age vs 7afe??
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Tue, 16 November 2004 03:58
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so why not just get the certain F head on the 7afe block instead of a 7age??
or is that certain f head hard to find??
if the G head can fit on 7af block, The certain F head should fit as well right??
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Location:
Sydney
Registered:
July 2004
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Re: 7age vs 7afe??
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Tue, 16 November 2004 10:54
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When Bill mentioned it, it sounds like an uncommon head. It sounded like the majority of F heads don't flow very well.
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Location:
wollongong
Registered:
October 2004
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Re: 7age vs 7afe??
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Tue, 16 November 2004 11:53
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ive heard good things bout the normal F heads, ive been told by a mate (reliable chap) that the F head can be made to flow very decently, anyone else heard anything, or rather 'know' anything? about that
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Location:
Rosanna, Melb
Registered:
June 2002
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Re: 7age vs 7afe??
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Tue, 16 November 2004 11:58
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Search for "4A: F vs G heads" or something very similar. And look at the Starlet page part of www.billzilla.org
That's about all I've ever seen of the matter on the internet.
Hen
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Location:
Montrose, VIC
Registered:
May 2002
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Re: 7age vs 7afe??
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Tue, 16 November 2004 12:01
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Besides, the REST of the 7AF might not be ideal for making huge power 
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I Supported Toymods
Location:
south Melbourne/KL
Registered:
June 2004
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Re: 7age vs 7afe??
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Tue, 16 November 2004 13:00
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| Henn wrote on Tue, 16 November 2004 22:58 |
Search for "4A: F vs G heads" or something very similar. And look at the Starlet page part of www.billzilla.org
That's about all I've ever seen of the matter on the internet.
Hen
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i was actually implying to that article u started hen. It says that F heads flow better so fit it on 4ag block. =4aFe
Then other ppl will say put 4ag head on 7afe block. = 7age.
Wouldnt it be better to go straight to a hybrid 7AFE, having better F head flow, and 7AFE 1.8 litre displacement??
Am i making any sense??
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Location:
holland
Registered:
November 2004
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Re: 7age vs 7afe??
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Tue, 16 November 2004 13:20
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the valve angle in the F head is crap to make any decent power the G 45degrees is much better. check cosworth fan sites for more info on the valve angle thingy
7AGE would be best but 7afe block aint that strong I'm told
grtz Thomas
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Location:
Melbourne
Registered:
November 2003
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Re: 7age vs 7afe??
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Tue, 16 November 2004 13:25
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From what I hear there are 3 7A-FE heads. 2 are total balls, the other has potential, but needs serious port work (according to Bill).
The problem isn't that the close angle head is a bad idea, it's that Toyota has designed it's sports heads around a wide angle, not close. That means the GE heads have FAR more support. Thats a good reason to go wide angle. Price.
Anyway, the 4A-GE is shorter stroke. Means you can rev it higher without having to strengthen the conrods.
Please feel free to contradict me anyone who knows more about this than me. I'm just working off what I have heard and theorized. 
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I Supported Toymods
Location:
south Melbourne/KL
Registered:
June 2004
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Re: 7age vs 7afe??
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Tue, 16 November 2004 13:27
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CALLING FOR BILL SHERWOOD!!!
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Location:
Brisbane / Gold Coast
Registered:
May 2002
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Re: 7age vs 7afe??
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Tue, 16 November 2004 23:01
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| RouwT wrote on Wed, 17 November 2004 00:20 |
the valve angle in the F head is crap to make any decent power the G 45degrees is much better. check cosworth fan sites for more info on the valve angle thingy
7AGE would be best but 7afe block aint that strong I'm told
grtz Thomas
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Nope - The included valve angle on F1 heads for about the last decade or two & nearly three is less than 30deg for all the good engines. Some of them down to around 15deg.
| b1gb3n wrote on Wed, 17 November 2004 00:27 |
CALLING FOR BILL SHERWOOD!!!
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What??
There's links to my site explaining all this and showing pics. I'm not needed here.
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Location:
Rosanna, Melb
Registered:
June 2002
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Re: 7age vs 7afe?? (attn bill mr. sherwood)
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Wed, 17 November 2004 13:41
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I think the general answer to your question is that the good F head has more potential (but needs a lot of port and cam and throttle work) whereas the G head may not have quite as much potential, but give good gains straight out of the box, and has far more support.
So do you want to fully strip your head and rebuild a wild one-off race engine, or do you want to do an "easy" mod to give your 7AFE some more poke?
Hen
PS, of course, no mention of 7A conrods, bore vs stroke etc...
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I Supported Toymods
Location:
south Melbourne/KL
Registered:
June 2004
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Re: 7age vs 7afe?? (attn bill mr. sherwood)
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Wed, 17 November 2004 14:46
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| Henn wrote on Thu, 18 November 2004 00:41 |
I think the general answer to your question is that the good F head has more potential (but needs a lot of port and cam and throttle work) whereas the G head may not have quite as much potential, but give good gains straight out of the box, and has far more support.
So do you want to fully strip your head and rebuild a wild one-off race engine, or do you want to do an "easy" mod to give your 7AFE some more poke?
Hen
PS, of course, no mention of 7A conrods, bore vs stroke etc...
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so 7age is pretty much a matter of convinience i guess
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Location:
wollongong
Registered:
October 2004
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Re: 7age vs 7afe?? (attn bill mr. sherwood)
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Mon, 06 December 2004 11:02
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yeah just looking for a lil more poke, i got a high flow cat, and cat back exhaust, gives a bit of a punch, but i want more. would love to go all out, and eventually, hopefully, I will
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Location:
Newcastle
Registered:
July 2003
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Re: 7age vs 7afe?? (attn bill mr. sherwood)
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Tue, 07 December 2004 08:16
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dare i say it but it'd probaly be a heap less effort just to jem a 4age in there and not have to bollocks around with making the 7a bottom end tough ? unless of course you are pulling out the stops and want to make a big dollar engine. but then perhaps you might use the 7a block for the capacity but surely you would use the G head if for no other reason then the number of parts avaliable off the shelf.
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Location:
Sydney, OZ
Registered:
May 2002
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Re: 7age vs 7afe?? (attn bill mr. sherwood)
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Wed, 08 December 2004 02:07
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| Quote: |
I think the general answer to your question is that the good F head has more potential (but needs a lot of port and cam and throttle work) whereas the G head may not have quite as much potential, but give good gains straight out of the box, and has far more support.
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Yes, That the whole point! Finally someone understands.
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so 7age is pretty much a matter of convinience i guess
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Try and find someone to make you billet cam's for a 7AFE? and I mean someone who actually Know what there doing.
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would love to go all out, and eventually, hopefully, I will
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Got Deep pockets? 7AGE will be more cost effective vs a 7AFE with same mod's
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the 7a bottom end tough ?
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What's a set of good rod's? if your not taking it up to or past 7,500 rpm you don't need anything but shot peening, mine lasted 2 year's of competion life before going Bang at 10,000rpm on a sloppy gear change.. We opted for the good gear, so that It will last longer than two year and on rebuild's I would be buying essential's like bearings, oil pump's etc, not whole block's and other crap, + I had some extra cash to throw around too, so why not, bottom end aren't that costly... top end are.
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block creating a 7age. This is much talked about on www.club4ag.net and mentioned b4 here in toymods.
